Electric switch.



No 848,028. PATENTED MAR. 26, 1907) G. W. HART.

ELECTRIC SWITCH.

APPLICATION FILED JUNE 25, 1906,

2 v W 1 e I 3 84 1 0041 loz GTE/1 7%??? L (s Qua anus a v receptacle filled with oil.

'ful Improvements in Electric Switches, of

- accompanying single sheet of drawings.

-isa bottom view of the receptacle and sup- PATENT ornren.

GERALD W. HART, OF HARTFORD, CONNECTICUT, ASSIGNOR TO THE HART lVIANUFACTURING 00., OF HARTFORD, CONNECTICUT, A CORPORATION OF NEW JERSEY.

ELECTRIC SWITCH.

Specification of Letters Patent.

Patented March 26, 1907.

Application filed June 25,1906- Serial No. 323,194.

To all, whom it may concern: Be it known that I, GERALDNV. HART, a citizen of the United States, residing at- Hartford, county of Hartford, State of Connecticut, (postoflic'e address 103 Allyn street,) have invented certain new and'usewhich the following is a full, clear, and exact description. v

My invention relates to improvements in electric switches, and particularly snapswitches;

The object of the invention is to provide a switch, for instance, adapted to be secured to the ceiling and which will be removable and safe from sho'rt-circuiting or arcing.

The invention consists in improvements the principles of which are illustrated in the Briefly, -it contemplates the mounting of the terminals and switch-arm in a cup-like Figure 1 is a side elevation showing the o1l-conta1n1ng receptacle in section. Fig. 2

ort.

p 1 indicates the base of insulating materialfor instance, such as porcelain-which is secured to the under side of a support-2 and provided with suitable passages for the wiring. The terminals 3 and 4 are carried by the insulating-base and are of suitable construction.

5 indicates the switch arm or lever, which is adapted to connect the terminals 3 and .4. This switch-arm is carried by a rotatable pole-piece or post 6 and revolves in a substantially horizontal plane, as shown. A suitable mechanism is provided for holding the switch-arm in its proper position and re- 5 leasing it at theproper time.

7 indicates the receptacle, having a chami ber S filled with oil, sullicient oil to cover the arm 5, as shown in dotted line, Fig.1. The upper edge of the receptacle 9 surrounds the y insulatingpiece 1 and fits snugly thereto, but l not tight enough to prevent relative move-- ment. The receptacle is preferably formed g in one piece and is perfectly tight, so that no l l l oil can possibly leak'out. It is preferably removably secured to the pole-piece 6as, for instance, by a screw-thread -so that the receptacle may rotate with the pole-piece in one direction at least. provided ,which projects downward from the receptacle for-the purpose of more conveniently turning the receptacle pole-piece. In the form shown it'will be noted that the receptacle maybe rotated in one direction to rotate the switch-arm correspondingly and that the receptacle may be removed by rotation in the opposite direction. The direction of operative rotation and the direction of removal will of course depend upon whether the screw-thread on the pole-piece is right or left hand.

While the construction is simple and may be manufactured at low cost and readily in.

switch-arm rotatablein a substantially hori zontal plane, an oil-containing receptacle surrounding the base, terminal and switcharm, and arranged to hold oil to a level overstanding said horizontally-rotatable switcharm, said receptacle being rotatably mount .ed and operatively connected with said switch-arm whereby when. said receptacle is revolved, said switch-arm will be actuated.

. GERALD W. HART. F Witnesses:

H. A. HART, R; L. JACQUES.

A thumb-piece 10 is 

